Sahih Bukhari Volume 4, Book 56, Hadith 2908

قَالَتْ وَكَانَ يَوْمُ عِيدٍ يَلْعَبُ السُّودَانُ بِالدَّرَقِ وَالْحِرَابِ، فَإِمَّا سَأَلْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم وَإِمَّا قَالَ ‏"‏ تَشْتَهِينَ تَنْظُرِينَ ‏"‏‏.‏ فَقَالَتْ نَعَمْ‏.‏ فَأَقَامَنِي وَرَاءَهُ خَدِّي عَلَى خَدِّهِ وَيَقُولُ ‏"‏ دُونَكُمْ بَنِي أَرْفِدَةَ ‏"‏‏.‏ حَتَّى إِذَا مَلِلْتُ قَالَ ‏"‏ حَسْبُكِ ‏"‏‏.‏ قُلْتُ نَعَمْ‏.‏ قَالَ ‏"‏ فَاذْهَبِي ‏"‏‏.‏ قَالَ أَحْمَدُ عَنِ ابْنِ وَهْبٍ، فَلَمَّا غَفَلَ‏

She said:It was the day of 'Id when negroes used to play with leather shields and spears. Either I requested Allah's Apostle or he himself asked me whether I would like to see the display. I replied in the affirmative. Then he let me stand behind him and my cheek was touching his cheek and he was saying, "Carry on, O Bani Arfida (i.e. negroes)!" When I got tired, he asked me if that was enough. I replied in the affirmative and he told me to leave.